Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Main Body ECU Vehicle Information Reading/Writing Process Malfunction (B15F6)

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System (for 12.3 Inch Display) / Main Body ECU Vehicle Information Reading/Writing Process Malfunction (B15F6)

DESCRIPTION

This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the audio and visual system vehicle customization screen.

HINT:

The main body ECU (multiplex network body ECU) controls the items for the following systems that are customizable via the multi-display assembly screen:

  • Power door lock control system
  • Wireless door lock control system
  • Lighting system (for Interior)
  • Lighting system (for Exterior)

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15F6

Main Body ECU Vehicle Information Reading/Writing Process Malfunction

Main body ECU (multiplex network body ECU) vehicle setting processing malfunction
  • CAN communication system
  • Power door lock control system
  • Wireless door lock control system
  • Lighting system (for Interior)
  • Lighting system (for Exterior)
  • Main body ECU (multiplex network body ECU)
  • Radio receiver assembly

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

Click here

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here

OK:

CAN communication DTCs are not output.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

2.

CHECK POWER DOOR LOCK CONTROL SYSTEM

(a) Check if the power door lock control system is malfunctioning.

Click here

HINT:

Customization may not be possible depending on the malfunction in the power door lock control system.

OK:

No malfunctions are present in the power door lock control system.

NG

GO TO POWER DOOR LOCK CONTROL SYSTEM

OK

3.

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

(a) Check if the wireless door lock control system is malfunctioning.

Click here

HINT:

Customization may not be possible depending on the malfunction in the wireless door lock control system.

OK:

No malfunctions are present in the wireless door lock control system.

NG

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM

OK

4.

CHECK LIGHTING SYSTEM (for Interior)

(a) Check if the lighting system (for Interior) is malfunctioning.

Click here

HINT:

Customization may not be possible depending on the malfunction in the lighting system (for Interior).

OK:

No malfunctions are present in the lighting system (for Interior).

NG

GO TO LIGHTING SYSTEM (for Interior)

OK

5.

CHECK LIGHTING SYSTEM (for Exterior)

(a) Check if the lighting system (for Exterior) is malfunctioning.

Click here

HINT:

Customization may not be possible depending on the malfunction in the lighting system (for Exterior).

OK:

No malfunctions are present in the lighting system (for Exterior).

NG

GO TO LIGHTING SYSTEM (for Exterior)

OK

6.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs
NEXT

7.

CHECK FOR DTC

(a) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
A

END
B

REPLACE RADIO RECEIVER ASSEMBLY

    Air Conditioner ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)
    DESCRIPTION This DTC is stored when items controlled by the air conditioning amplifier assembly cannot be customized via the audio and visual system vehicle customization screen. HINT: The air conditi ...

    Certification ECU Vehicle Information Reading/Writing Process Malfunction (B15F7)
    DESCRIPTION This DTC is stored when items controlled by the certification ECU (smart key ECU assembly) cannot be customized via the audio and visual system vehicle customization screen. HINT: The cert ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Power Seat Switch(w/ Seat Position Memory System): Installation
    INSTALLATION CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the parts may injure your hands. PROCEDURE 1. INSTALL POSITION CONTROL ECU AND SWITCH ASSEMBLY LH (a) Install the position control ECU and switch assembly LH to the front seat cushion shield LH with the 3 screws. ...

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Telematics System: How To Proceed With Troubleshooting
    CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the telematics system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT: In troubleshooting, check that the problem symptoms h ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2026 Copyright www.lexusrx.net
    0.0107